Weiro FARC-200 User manual

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FARC - 200
INVERTER DC MMAWELDING MACHINE
W E I R O
OPERATION MANUAL
(Read the manual carefully before installation, operation and maintenace)
Safety Depends on You
WEIRO are welding and cutting equipment is designed and built with safety in mind.
However, your overall safety can be increased by proper installation... and thoughtful
operation in your part. DO NOT INSTALL, OPERATE OR REPAIR THIS
EQUIPMENT WITHOUT READING THIS MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED THROUGHOUT. And, most importantly, think
before you act and be careful.
C V. A N U G R A H D U TA N I A G A
Jln. Arief Rahman Hakim 51 Komplek Ruko 21 Klampis Blok D-1
Telp. 031 –5990089, 5997259 (Hunting)
Fax. [phone]
Email : [e-mail]

·１·
Index
1. Principle & Technical data……………………………………….....( 1 )
2. Installation Guide…………………………………………………...( 4 )
3. Repair & Maintenance……………………………………………...(7)
Appendix A: EMC Suggestion for installation and use of welder…….. (10)
Appendix B: Feedback Form………………………………………..…(12)

·２·
Principle & Technical data
FARC series block diagram of principle:
Figure 1: Block diagram of principle
This series welding machines applies HF MOSFET inverter technology. 1- phase 230V±10% input volt is
rectified by rectifier, inverted into HF AC, reduced by HF transformer, rectified and filtered by HF rectifier,
then output DC power suitable for welding. After this process, the welder’s dynamically responsive speed
has been greatly increased, so the welder size and weight are reduced noticeably.
Power source enjoy sound anti-fluctuating ability and high-quality performance during external context
changes. Easy to arc start, stable arc length, pretty weld formation and capability of continuous adjusting
the welding current.
54
U(V)
I(A)
U=20+0.04I
Imin
Imax
0
9
20
15
Figure 2: MMAmode Volt-Ampere curve
AC230V±10% / 50/60Hz
1-phase
Rectifier
HF
inverter
HF
transformer
Rectifier &
Filter
Control
circuit
Output

·３·
1. Main technical parameters
►FARC series:
Model
FARC180
FARC200
FARC250
Type
MOSFET Inverter
Rated input voltage (V)
1-phase AC230±10% ~ 50/60Hz
(1-phase AC220±15% ~ 50/60Hz)
Rated input capacity (KVA)
6.1
7
9.4
Rated input current (A)
27.2
(28.4)
31
(32.5)
41.6
(43.5)
Rated duty cycle @ 25℃ (%)
60
60
50
Rated output open-load voltage (V)
9
Range of output current (A)
20～180
20～200
20～250
Range of output voltage (V)
20.8～27.2
20.8～28
20.8～30
MMAArc-force current (A)
50～100
MMAarc-striking current (A)
50
Protection class
IP21
Insulation class
F
Cosφ
0.98
Efficiency (%)
≥80
Cooling style
Air-blast cooling
Weight (Kg)
9.5
Dimension L×W×H (mm)
389×155×299
Table 1: FARC Series Parameter Specification

·４·
2. Main circuit diagram
►FARC series:
Figure 3: ARC/ARC-II Series Main Circuit Diagram
电气有限公司
山东山大奥太
更改文件号分区处数标记 签名 年、 月、 日
设计 标 准 化
审核
工艺批准 共张第张
比例重量阶 段 标 记
质量
B
T1 RB1
RB2
C12 R9
+
_
C11 R7
C11 R8
AP1
Power Source Control Circuit
AP6
C6
R2
C5
R1
CE1
RD1
RE1
C1
Front Panel
AP5 AP4
Power Supply
R6
C10
SF1
KF1
KF2
C4 C3
R4 C8
R5 C9
R3 C7
KF4
KF3
C14
C15
EMC Capacitor(CE seiers machine)
EMC Filter(CE seiersmachine)
GQ
Thermal Switch
+15 V -15 V
VRD
TB1
RA1
TA

·５·
Installation Guide
1．Pre-installation
1.1 Installation Environment
FARC series welding machines are designed for use in adverse environments. Examples of
environments with increased adverse conditions are:
In locations in which freedom of movement is restricted, so that the operator is forced to
perform the work in a cramped (kneeling, sitting or lying) position with physical contact with
conductive parts.
In locations which are fully or partially limited by conductive elements, and in which there is
a high risk of unavoidable or accidental contact by the operator.
In wet or damp hot locations where humidity or perspiration considerably reduces the skin
resistance of the human body and the insulation properties of accessories.
Environments with adverse conditions do not include places where electrically conductive
parts, in the near vicinity of the operator, which can cause increased hazard, have been
insulated.
The gradient of ground must be no more than 10°.
Ensure no wind at the welding position, or use screen to block the wind.
The distance between welder and wall must be more than 30cm, between welders more than
10cm to ensure enough heat radiation.
When using water-cooled torch, must be care of not being frozen.
1.2. Installation Location
Be sure to locate the welder according to the following guidelines:
In areas, free from moisture and dust.
Ambient temperature between 0 degrees C to 40 degrees C.
In areas, free from oil, steam and corrosive gases.
In areas, not subjected to abnormal vibration or shock.
In areas, not exposed to direct sunlight or rain.

·６·
1.3 Power Source Connections
Warning
Thermal Arc advises that this equipment be electrically connected by a qualified electrician.
ELECTRIC SHOCK can kill; SIGNIFICANT DC VOLTAGE is present after removal of
input power.
DO NOT TOUCH live electrical parts.
SHUT DOWN welding power source; disconnect input power employing lockout/tagging
procedures.
Lockout/tagging procedures consist of padlocking line disconnect switch in open position.
Removing fuses from fuse box, or shutting off and red-tagging circuit breaker or other
disconnecting device.
1.4．Power Supply Requirements
Input volt must be standard sine wave, effective value 230V±10%, and frequency 50/60Hz.
Unbalance degree of 1- phase volt must be no more than 5%.
Power supply:
Product type
FARC200
Power Supply
1- phase AC 230V±10%，50/60Hz
Electricity Grid
min. capacity
7.5KVA
Input volt
protection
Fuse
50A
Circuit Breaker
60A
Cable size
Input volt
2.5mm2
Output volt
16mm2
Ground lead
2.5mm2
Table 2: FARC Series Power Supply Connection
Note: The size of fuse and breaker in the table are for reference only.

·７·
2. Installation:
The input power supply of this series of welding machine is 1- phase AC 230V±10%，50/60Hz. The
switchboard with circuit breaker is needed. Connect the ground cable firmly.
3.Machine Assembling Guide:
(1)Connect the welding cable firmly.
(2)Turn on the power switch of the welding machine.
(3)Connect the input 1 phase power supply cable with the switchboard, switch on.
Attention: Cut off the power supply before connecting the welding cable. Put the plug into the socket,
and then turn it clockwise to ensure good connection between the plug and socket

·８·
Repair & Maintenance
WARNING: Have a qualified electrician do the maintenance and trouble shooting work. Turn the input
power off, using the disconnect switch at the fuse box before working inside the machine.
1. Cautions:
Rivet equipment name tag on the specified area of the case, otherwise the inside parts will possibly
be damaged.
Connect welding cable to terminals firmly, otherwise the terminals will be burn out which will
cause the instability of welding process.
Avoid welding cable and control cable being broken, and prevent welding machine from being
short circuit.
Never let welding machine be bumped into or stacked up by heavy objects.
Ensure good ventilation.
Under high temperature, if work with large current for long period, welder may shut down
automatically due to thermal protection acts .At this point, let the machine runs under open-load for
a few minutes, and it will be automatically recover.
Under high temperature, if work with large current for long period, welder may shut down
automatically due to air switcher trips. Cut off the power supply to the electricity switchboard on
frame, and wait for 5 minutes to turn on the air switcher on the power source fist then connect the
power supply to the electricity switchboard on frame. And leave the machine runs under open-load
condition for a while.
After welding, cut off the gas supply and the power supply.
2. General maintenance
Remove dust from power resource with pressure air by qualified individuals every 3-6 months.
Check if the jointers are loose.
Check regularly if cables are worn out, knobs are loose, and components of panel are damaged.
Check regularly if cables are tightly connected to cable connecting terminals in case of terminals
being burnt out.
Clean and replace Contact Tip and Tungsten Electrode in time.

·９·
3. Procedure for regular checking prior to maintenance
Check if all front panel switches are on the proper positions.
Check if the input volt has the phase missing, and range are between 187~253V.
Check if the input cable is connected correctly and firmly with the power source.
Check if the ground lead is connected correctly and firmly.
Check if the welding cables are connected correctly and firmly.
Check if gas regulator is in good situation and gas flows out normally.
WARNING: Have a qualified electrician do the maintenance and trouble shooting work. Turn the input
power off, using the disconnect switch at the fuse box before working inside the machine. Don’t open up
case uninstructed, the max volt inside machine is 400V. Never discharge high voltage to welder case with
welding torch! Shut down power source before changing or repairing welding cable or torch.

·１０·
№
TROUBLE
CAUSES
WHAT TO DO
1
Power on LED does not
light up, fan does not run,
no output when machine
switches on
1) Power switch is damaged
2) No electricity on the
electricity grid
3) Short circuit in the power
supply cable
1) Check Power switch and
the fan
2) Check power supply on
the electricity grid
3) Check the connection of
power supply cable
2
Power on LED lights up,
but not Protection on LED,
and no output
1) Over-current protection
2) Ground cable is not well
connected to the work piece
3) Upper layer board is damaged
1) Turn off the machine, and
turn on again after 1 minute
2) Check the connection of
ground cable
3) Replace
3
Circuit breaker on the
switchboard trips while in
welding
1) The following devices may be
damaged: MOSFET, Output diode
module, etc
2) Pulse drive board is damaged
3) Input rectifier bridge is
damaged
1) Check and replace.
2) If MOSFET is damaged,
check if Resistor (10Ω,
3KΩ), and Voltage regulator
tube (IN4148, 3V) are
damaged
4
Welding current is not
stable
1) Welding Current adjustment
potentiometer is damaged
2) Main control board is damaged.
3) Bad connection in the welding
machine
Check and replace
5
Welding current is not
adjustable
1) Welding Current adjustment
potentiometer is damaged
2) Main control board is damaged
Check and replace
Table 3: Trouble-shooting Table

·１１·
Appendix A
1. General
The user is responsible for installing and using the arc welding equipment according to the
manufacturer’s instructions. If electromagnetic disturbances are detected, then it shall be the
responsibility of the user of the arc welding equipment to resolve the situation with the technical
assistance of the manufacturer. In some cases this remedial action may be as simple as earthling the
welding circuit, see note. In other cases it could involve constructing an electromagnetic screen
enclosing the welding power source and the word complete with associated input filters. In all cases
electromagnetic disturbances shall be reduced to the point, where they are no longer troublesome.
NOTE: The welding circuit may not be earthed for safety reasons. Changing the earthling
arrangements should only be authorized by a person who is competent to assess whether the
changes will increase the risk of injury.
2. Assessment of area
Before installing arc welding equipment the user shall make an assessment of potential electromagnetic
problems in the surrounding area. The following shall be taken into account:
1) Other supply cables, control cables, signaling and telephone cables, above, below and adjacent to the
arc welding equipment;
2) Radio and television transmitters and receivers;
3) Computer and other control equipment;
4) Safety critical equipment, for example guarding of industrial equipment;
5) The health of the people around, for example the use of pacemakers and hearing aids;
6) Equipment used for calibration or measurement;
7) The immunity of other equipment in the environment is compatible. The user shall ensure that other
equipment being used in the environment is compatible. This may require additional protection
measures;
8) The time of day that welding or other activities are to be carried out.
3. Methods of reducing emissions
1) Public supply system
Arc welding equipment should be connected to the public supply system according to the
manufacturer’s recommendations. If interference occurs, it may be necessary to take additional
precautions such as filtering of the public supply system. Consideration should be given to shielding
the supply cable of permanently installed arc welding equipment, in metallic conduit or equivalent.
Shielding should be electrically continuous its length. The shielding should be connected to the

·１２·
welding power source so that good electrical contact is maintained between the conduit and the
welding power source enclosure.
2) Maintenance of the arc welding equipment
The arc welding equipment should be routinely maintained according to the manufacturer’s
recommendations. All access and service doors and covers should be closed and properly fastened
when the arc welding equipment is in operation. The arc welding equipment should not be modified in
any way, except for those changes and adjustments covered in the manufacturer’s instructions. In
particular, the spark gaps of arc striking and stabilizing devices should be adjusted and maintained
according to the manufacturer’s recommendations.
3) Welding cables
The welding cables should be kept as short as possible and should be positioned close together,
running at or close to the floor level.
4) Equipotent bonding
Bonding of all metallic components in the welding installation and adjacent to it should be considered.
However, metallic components bonded to the word piece will increase the risk that the operator could
receive an electric shock by touching these metallic components and the electrode at the same time.
The operator should be insulated from all such bonded metallic components.
5) Earthling of the work piece
Where the work piece is nor bonded to earth for electrical safety, nor connected to earth because of its
size and position, for example ships hull or building steelwork, a connection bonding the work piece
to earth may reduce emissions in some, but not all instances. Care should be taken to prevent the
earthling of the work piece increasing the risk of injury to users, or damage to other electrical
equipment. Where necessary, the connection of the work piece to earth should be made by a direct
connection to the work piece, but in some countries where direct connection is not permitted, the
bonding should be achieved by suitable capacitance, selected according to national regulations.
6) Screening and shielding
Selective screening and shielding of other cables and equipment in the surrounding area may alleviate
problems of interference. Screening of the entire welding installation may be considered for special
applications.

·１３·
Appendix
B
Feedback Form
Name of Company
Address
Contact person
Title
Telephone No
Fax No.
Email Address
Company’s filed of business
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